Pumping apparatus.



PATENTED AUG. 23, 1904.

A. G. B. RATEAU. PUMPING APPARATUS.

APPLICATION FILED DEC. 15, 1902. NO MODEL. 3 SHHETS-SHEET l.

Fig.1. $347 I WW aw x PATENTED AUG. 23, 1904.

A. G. E. RATEAU. PUMPING APPARATUS.

APPLICATION EILED DBO. 15, 1902.

3 SHEBTS-SHEET 2.

N0 MODEL.

No. 768,076. I PATENTED AUG. 23, 1904.

v i Ai GI El PUMPING APPARATUS.

APPLICATION FILED DEG. 15,1902.

N0 MODEL 3 SHEETS- SHEET 3;

wa'wowz I UNITED ISTATEs Patented August 23, 1904.

PATENT OFFICE.

PUMPING APPARATUS. I,

SPECIFICATION forming part of- Letters Patent No. 768,076, dated August23, 1904. Application filed December 15, 1902. Serial No.'185,191. (Nomodel.)

To all whom zit may concern:

Be it known that I, A eUsrn CAMILLE ED- MOND RATEAU, a citizen of theRepublic of France, residing at Paris, France, have invented a new anduseful Improvement in Pumping Apparatus, of which the following is aspecification.

The growing employment of centrifugal pumps for pumping to a greatheight either in installations for working mines or in industrialinstallations forany purpose has led me to invent an arrangement ofpumping apparatus which allows the centrifugal pump to be directlydriven by a steam-turbine. The

difficulty met with in this type of apparatus is to make the centrifugalpump ,deliver in good quantities. It is necessary for this purpose whenthe height exceeds certain limits to be able to feed the centrifugalpump. I therefore place two pumps upon the same shaft, the main one andan accessory feed-pump, the two pumps being directly driven by thesteam-turbine. As in many cases it is necessary to provide means forcondenslng the steam in the turbine, the system is rendered complete bythe addition of an ejecto-condenser, which is fed with the liquid to beraised. Lastly, the novel machine is itself governed in a manner whichforms part of the invention.

The nature and scope of my invention will be more fully understood fromthe following 1 description, taken in connection with the accompanyingdrawings, forming part hereof, in which-- Figures 1 and 1 show a partiallongitudinal section of the pumping apparatus. Figs. 2 and 2 show a planview. Fig. 3 is a sectional view, on a larger scale, showing thearrangement for governing by the inlet of steam.

1 is the turbine, provided with one or more moving wheels.

2 is'the inlet for the steam, which passes into the obturator, whichwill be mentioned later.

3 is the exhaust-outlet, the steam passing into the ejecto-condenser.

4 is the turbine-shaft extending beyond the casing.

5 is the bearing for the shaft. 6 is the shaft extending beyond thebearing upon which the pumps are mounted.

7 is the stufling-box of the pump-inlet.

8 isthe propeller of the main pump.

9 is the casing, into which the water passes on its way to the port ofthe propeller 8.

10 is the port of the inlet of the propeller 8. a 11 is thedelivery-chamber receiving water at the outlet from the propeller 8.

12 is the flange of the outlet-pipe of the delivery-chamber.

13 13 represent the propeller of the feedpump provided with two sets ofports.

14 and 15 are the ports of the propeller 13 13.

16 is the casing containing the water pass,- ing to the ports 14: and 15of the feed-pump.

17 is the delivery-chamber, which receives the water at the outlet fromthe propeller 13 13.

18 is the fiangeof the pipe leading from the delivery-chamber '17.

19 is the pipe conveying the water passing from the feed-pump to themain pump.

20 is the inlet-pipe for the water into the interior of the casing 9 ofthe main pump.

21 is the inlet-suction orifice of the feedpump, which draws water intothe casing 16.

22 is the propeller'of the pump intended to supply the ejecto-condenser.

23 is the port of the pump feeding the ejectocondenser and which obtainsits water-supply from the casing 16.

24 is the delivery-chamber, receiving water at the outlet from thepropeller 22.

25 is the flange of the pipe from the delivery-chamber 24.

26 is the delivery-pipe of the pump feeding the ejecto-condenser andleading to the suc tion-pipe of the ejecto-condenser.

27 is the inlet-pipe into the ejecto-condenser.

28 is the ejecto-condenser.

29 is the outlet-orifice for the water of condensation from theejecto-condenser.

30 is the pipe leading the water at the outlet from the ejecto-condenserinto the casing 16 of the feed-pump.

31 is the flange of the inlet-pipe for the water from theejecto-condenser into the easing 16.

32 is the centrifugal fan, keyed to the end of the shaft of thesteam-turbine.

33 is the delivery-tube for the air coming from the fan 32 and passinginto the apparatus governing the speed.

34 is a flexible membrane governing the obturator-rod placed at thesteam-inlet.

35 is a counter-spring for regulating the flexible membrane 3 1.

36 is the obturator, provided with passages placed at'the steam-inlet.

37 is a valve governed by a hand-wheel, which can interruptcommunication with the steam-inlet tube 2.

38 is the casing containing the steam-obturator.

39 is the outlet-orifice for the steam after passing through theobturator.

10 is the pipe leading the steam into the turbine after its passagethrough the obturator.

41 is a frame common both to the turbine and the pumps.

42 is the orifice putting the flexible membrane into communication withthe outer air.

13, Fig. 4, is a pipe connecting together the upper portion of thecasing inclosing the flexible membrane 34: and the main deliverypipe 12of the pump.

44-. is the end of the pipe 43, passing into the pump-delivery andterminating in'an open tube.

ll m'lcz'ag 0f the apparatua-The turbine is driven by means of steampassing through the inlet-pipe 2. The pipe 2 is directly closed by meansof a needle-valve'37, actuated by ahand-wheel. As soon as the said valveis open steam passes through an obturator provided with passages. Themethod of governing said obturator Will be explained later. It thenpasses to the steam-turbine, expands in the different wheels composingit, (the turbine may, however, be composed of a single moving wheel,)and at its outlet from the turbine passes through the connecting-pipe 3,which leads to the ejecto-condenser. The turbine-shaft after havingtraversed the bearing 5 passes directly to the pumps. The pumps areformed of the main pump, the propeller 8 of which sucks water into thecasing 9 and forces it into the delivery-chamber 11. which fills thecasing 9 is derived from the twopassage feed-pump 13 13. It is the saidsecond pump which takes water directly through the suction-orifice 21from the reservoir-containing the water. The two-passage pump 13 13 iscapable of sucking at a distance of several meters. It forces the liquidunder a differing head, dependent'upon the dimensions of the pump 8. Itis almost entirely upon the latter pump that the height to which thewater is pumped depends. The water from the two- The water passage pump13 13 is collected by the delivery-chamber 17, passes out through 13,and passes through the pipe 19 into the suctionpipe 20 of the main pump.The main pump has a propeller 8 of relatively small width or caliber,and the diameter of the propeller S is relatively larger than thediameter of the propeller of the feed-pump 13, the caliber of whichfeed-pump propeller being relatively larger than the caliber of thepropeller 8 of the main pump. At its passage out of the main pump thewater passes into the deliv- .erycolumn through the pipe 12.

If desired, the outlet to the condenser may adjoin the steam-turbine.For this object the turbine is provided with an ejecto-comlenser 28,which is fed under pressure by a small centrifugal pump 22, placed atthe end of the shaft. The said centrifugal pump takes water from theportion of the suction-chain])er [(3 which feeds the passages 15 of thefeed-pump. The water which passes out from the small centrifugal pump,through the deli very-chamber 24, and the pipe provided with the flange.25 passes through the pipe 26 into the. ejectocoridenser. The watercauses the steam passing out from the turbine to be coniilensed, and thewhole of the steam and the water of condensation returns through thepipe 30 and the pipe provided with the flange 31 into that por tion ofthe sucking-clnnnber 16 which feeds the pump-port 1a of the feed-pump.lt will be seen that in this arrangement a fraction of the suction-waterserves for the condensation. The water is derived from the main circuitof theliquid which passes from thesuction-orifice 21 to the lastdelivery-pipe provided with the flange 12. The advantage of thisarrangement consists in allowing the condensation of the steam of theturbine to greatly increase its useful effect by means of a smallsupplementary expenditure of mechanical work.

Mounting the three pumps upon the same shaft which is directly driven bya steam-turbine allows a compact and eflicient assemblage to be formed.The centrifugal pumps may be made to profit by the great speeds whichsteam-turbines allow of, and thus consequently obtain great elevations,which have not hitherto been possible to obtain with this class ofapparatus.

The speed of the turbine may be regulated in two different ways. It maybe governed by acting directly upon the obturator placed in the path ofthe inlet-steam. In its passage out through the valve 37 the steamtraverses the casing 38, which surrounds the obturator 36. The lattercarries a vertical rod which adjoins a flexible membrane 31, balanced bya counter-regulating spring 35. One means of governing consists inkeying upon the shaft of the turbine the centrifugal fan 32. The airdrawn by this fan passes through the pipe 33 to the upper portion of themembrane 31'.

fWhen the speed increases, the membrane causes the obturator to descendby drawing with it the obturatorrod and tends to strangle thesteam-inlet orifice. This method of governing is thus very sensitive,for the pressure 1. In a pumping apparatus of the character described, asteam-turbine and its shaft, a main centrifugal pump of high pressurelocated upon the turbine-shaft and driven thereby, a centrifugalfeed-pump of low pressure also located upon the turbine-shaft and driventhereby to constitute a means ,for forcing water 1nto the chamber of themain pump, an e ectO-cOndenser arranged to recelve the ex haust from theturbine, an auxiliary centrifugal pump arranged on the turbine-shaft andadapted to force water from the chamber of the feed-pump into andthrough the ejectocondenser, and a discharge from said ejectocondenserleading directly to the chamber of the feed-pump. r

2. In a pumping apparatus, ashaft, a steamturbine arranged on said shaftand adapted to drive the same at a high rate of speed, a highpressurecentrifugal pump located on said shaft and traveling at the same rate ofspeed, said pump having a propeller of relatively small caliber andlarge diameter, a low-pres sure centrifugal pump located on said shaftand traveling at the same rate of speed as the high-pressure pump,'saidlow-pressure pump having a propeller of relatively larger caliber andrelatively smaller diameter than the caliber and diameter of thepropeller of the main pump, a source of fluid-supply discharging intothe chamber of the low-pressure pump,

and a direct discharge from the low-pressure The method of to thehigh-pressure pump, constituting the sole source of supply for saidhigh-pressure p p- 3. In a pumping apparatus, a shaft, a steamturbinearranged on said shaft and adapted to drive the same at a high rate ofspeed, a highpressure'centrifugal pump having a relatively small caliberand large diameter located on said shaft and traveling at the same rateof speed, a low-pressure centrifugal pump having a relatively largecaliber and small diameterilocated on said shaft and traveling at thesame rate of speed as the high-pressure pump,

a source of fluid-supply discharging into the chamber of thelow-pressure pump, and a direct discharge from the low-pressure to thehigh-pressure pump, and constituting the sole source of supply for saidhigh-pressure pump,

in combination with a valve controlling the inlet of steam to theturbine and a centrifugal fan secured to and traveling with theturbineshaft, said fan arranged to control the steaminlet valve of theturbine.

4. In a pumping apparatus of the character described, the combination ofa steam-turbineand a shaft driven at a high rateof speed directly bysaid turbine, with a high-pressure single-way centrifugal pump having arela* tively large diameter and small caliber and a low-pressu retwo-way centrifugal pump having a relatively small diameter and largecaliber, both pumps located on and driven at the same rate of speed bysaid shaft, a source of fluid-supply from which said low-pressure pumpsucks the fluid through both its ways,

a chamber into which-both ways of the lowpressure pump discharges, vanda connection between said discharge-chamber and the inletchamber of thehigh-pressure pump, said connection constituting the sole source offluidsupply for the high-pressure pump.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

AUGUSTE GAMILLE. EDMOND RATEAU.

